import Vue from 'vue';
import VueRouter from 'vue-router';

/*import Login from '@/components/Login';
import Home from '@/components/Home';
import Welcome from '@/components/Welcome';
import Users from '@/components/user/Users';
import Rights from '@/components/power/Rights';
import Roles from '@/components/power/Roles';
import Cate from '@/components/goods/Cate';
import Params from '@/components/goods/Params';
import List from '@/components/goods/List';
import Add from '@/components/goods/Add';
import Order from '@/components/order/Order';
import Report from '@/components/report/Report';*/


// 路由懒加载
const Login = () => import(/* webpackChunkName: "Login_Home_Welcome" */ '@/components/Login.vue')
const Home = () => import(/* webpackChunkName: "Login_Home_Welcome" */ '@/components/Home.vue')
const Welcome = () => import(/* webpackChunkName: "Login_Home_Welcome" */ '@/components/Welcome.vue')

const Users = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '@/components/user/Users.vue')
const Rights = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '@/components/power/Rights.vue')
const Roles = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '@/components/power/Roles.vue')

const Cate = () => import(/* webpackChunkName: "Cate_Params" */ '@/components/goods/Cate.vue')
const Params = () => import(/* webpackChunkName: "Cate_Params" */ '@/components/goods/Params.vue')

const List = () => import(/* webpackChunkName: "GoodsList_Add" */ '@/components/goods/List.vue')
const Add = () => import(/* webpackChunkName: "GoodsList_Add" */ '@/components/goods/Add.vue')

const Order = () => import(/* webpackChunkName: "Order_Report" */ '@/components/order/Order.vue')
const Report = () => import(/* webpackChunkName: "Order_Report" */ '@/components/report/Report.vue')


Vue.use(VueRouter);
const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  {
    path: '/home',
    // 为什么还是要home组件，而上面的重定向不需要i，因为welcome组件是在home界面里面渲染出来的，所以需要先加载hoe界面
    component: Home,
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: Welcome },
      { path: '/users', component: Users },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles },
      { path: '/categories', component: Cate },
      { path: '/params', component: Params },
      { path: '/goods', component: List },
      { path: '/goods/add', component: Add },
      { path: '/orders', component: Order },
      { path: '/reports', component: Report }
    ]
  }

];

const router = new VueRouter({
  routes
});

// 挂载路由导航守卫,to表示将要访问的路径，from表示从哪里来，next是下一个要做的操作 next('/login')强制跳转login
router.beforeEach((to, from, next) => {
  // 访问登录页面 放行
  if (to.path === '/login') return next();
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token');
  // 没有token , 强制跳转到登录页面
  if (!tokenStr) return next('/login');
  // 有token 放行
  next();
});

export default router;
